Method and system for inspecting quality of tire member

A quality inspection system for a tire member for determining predetermined quality of a tire member that is elongated and that is formed by bonding a plurality of types of constituent members, the quality inspection system comprising:

• a conveying device configured to convey the tire member in a longitudinal direction;
• an X-ray inspection device configured to apply X-rays to a predetermined length range of the tire member from a top surface side of the tire member being conveyed by the conveying device to acquire image data based on X-ray transmittance of the predetermined length range;
• and
• a calculation device to which the image data is input,
• the quality inspection system being configured such that a process of acquiring the image data is continuously performed, the image data of the predetermined length range continuous without gaps in the longitudinal direction is acquired, and based on contrast in each piece of the image data acquired, a magnitude of variation in the predetermined quality of the tire member in the longitudinal direction is calculated by the calculation device.